Dark spatial solitons sequence in the biased centrosymmetric photorefractive crystal

作     者：ZHANG Yuhong JIA Xinjuan 

作者机构：College of Opto-Electronic EngineeringXi’an Technological UniversityXi’an710021China College of FreshmenXi’an Technological UniversityXi’an710021China 

出 版 物：《Optoelectronics Letters》 (光电子快报（英文版）)

年 卷 期：2022年第18卷第10期

页      面：601-605页

核心收录：

学科分类：070207[理学-光学] 07[理学] 08[工学] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：supported by the National Foundation of Shaanxi Provincial Department of Education(No.17JK0389) 

主　　题：conditions solitons soliton 

摘      要：We theoretically investigate the evolution of dark screening spatial solitons originating from the quadratic electro-optic effect in biased centrosymmetric photorefractive(CP) crystal by using beam propagation method(BPM). The results indicate that the multiple dark solitons sequence can be obtained in the CP crystal with the odd or even initial conditions. If the initial width of the dark notch is smaller, only a fundamental soliton or a Y-junction soliton pair is generated. When the initial width of the dark notch and the bias electric field are increased, the multiple dark spatial solitons sequence is formed, which realized a progressive transition from a low-order soliton to a higher-order solitons sequence in both odd and even conditions. The solitons characteristic is similar to that of screening solitons in the non-centrosymmetric photorefractive(NCP) crystals.